191 u64 fuse_get_unique(struct fuse_iqueue *fiq)  in fuse_get_unique()  argument
193 	fiq->reqctr += FUSE_REQ_ID_STEP;  in fuse_get_unique()
194 	return fiq->reqctr;  in fuse_get_unique()
206 static void fuse_dev_wake_and_unlock(struct fuse_iqueue *fiq)  in fuse_dev_wake_and_unlock()  argument
207 __releases(fiq->lock)  in fuse_dev_wake_and_unlock()
209 	wake_up(&fiq->waitq);  in fuse_dev_wake_and_unlock()
210 	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_dev_wake_and_unlock()
211 	spin_unlock(&fiq->lock);  in fuse_dev_wake_and_unlock()
221 static void queue_request_and_unlock(struct fuse_iqueue *fiq,  in queue_request_and_unlock()  argument
223 __releases(fiq->lock)  in queue_request_and_unlock()
228 	list_add_tail(&req->list, &fiq->pending);  in queue_request_and_unlock()
229 	fiq->ops->wake_pending_and_unlock(fiq);  in queue_request_and_unlock()
235 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()  local
240 	spin_lock(&fiq->lock);  in fuse_queue_forget()
241 	if (fiq->connected) {  in fuse_queue_forget()
242 		fiq->forget_list_tail->next = forget;  in fuse_queue_forget()
243 		fiq->forget_list_tail = forget;  in fuse_queue_forget()
244 		fiq->ops->wake_forget_and_unlock(fiq);  in fuse_queue_forget()
247 		spin_unlock(&fiq->lock);  in fuse_queue_forget()
253 	struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()  local
262 		spin_lock(&fiq->lock);  in flush_bg_queue()
263 		req->in.h.unique = fuse_get_unique(fiq);  in flush_bg_queue()
264 		queue_request_and_unlock(fiq, req);  in flush_bg_queue()
278 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_end()  local
291 		spin_lock(&fiq->lock);  in fuse_request_end()
293 		spin_unlock(&fiq->lock);  in fuse_request_end()
334 static int queue_interrupt(struct fuse_iqueue *fiq, struct fuse_req *req)  in queue_interrupt()  argument
336 	spin_lock(&fiq->lock);  in queue_interrupt()
339 		spin_unlock(&fiq->lock);  in queue_interrupt()
344 		list_add_tail(&req->intr_entry, &fiq->interrupts);  in queue_interrupt()
352 			spin_unlock(&fiq->lock);  in queue_interrupt()
355 		fiq->ops->wake_interrupt_and_unlock(fiq);  in queue_interrupt()
357 		spin_unlock(&fiq->lock);  in queue_interrupt()
364 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()  local
378 			queue_interrupt(fiq, req);  in request_wait_answer()
388 		spin_lock(&fiq->lock);  in request_wait_answer()
392 			spin_unlock(&fiq->lock);  in request_wait_answer()
397 		spin_unlock(&fiq->lock);  in request_wait_answer()
409 	struct fuse_iqueue *fiq = &fc->iq;  in __fuse_request_send()  local
412 	spin_lock(&fiq->lock);  in __fuse_request_send()
413 	if (!fiq->connected) {  in __fuse_request_send()
414 		spin_unlock(&fiq->lock);  in __fuse_request_send()
417 		req->in.h.unique = fuse_get_unique(fiq);  in __fuse_request_send()
421 		queue_request_and_unlock(fiq, req);  in __fuse_request_send()
576 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_simple_notify_reply()  local
588 	spin_lock(&fiq->lock);  in fuse_simple_notify_reply()
589 	if (fiq->connected) {  in fuse_simple_notify_reply()
590 		queue_request_and_unlock(fiq, req);  in fuse_simple_notify_reply()
593 		spin_unlock(&fiq->lock);  in fuse_simple_notify_reply()
1002 static int forget_pending(struct fuse_iqueue *fiq)  in forget_pending()  argument
1004 	return fiq->forget_list_head.next != NULL;  in forget_pending()
1007 static int request_pending(struct fuse_iqueue *fiq)  in request_pending()  argument
1009 	return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) ||  in request_pending()
1010 		forget_pending(fiq);  in request_pending()
1021 static int fuse_read_interrupt(struct fuse_iqueue *fiq,  in fuse_read_interrupt()  argument
1024 __releases(fiq->lock)  in fuse_read_interrupt()
1039 	spin_unlock(&fiq->lock);  in fuse_read_interrupt()
1051 struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,  in fuse_dequeue_forget()  argument
1055 	struct fuse_forget_link *head = fiq->forget_list_head.next;  in fuse_dequeue_forget()
1062 	fiq->forget_list_head.next = *newhead;  in fuse_dequeue_forget()
1064 	if (fiq->forget_list_head.next == NULL)  in fuse_dequeue_forget()
1065 		fiq->forget_list_tail = &fiq->forget_list_head;  in fuse_dequeue_forget()
1074 static int fuse_read_single_forget(struct fuse_iqueue *fiq,  in fuse_read_single_forget()  argument
1077 __releases(fiq->lock)  in fuse_read_single_forget()
1080 	struct fuse_forget_link *forget = fuse_dequeue_forget(fiq, 1, NULL);  in fuse_read_single_forget()
1087 		.unique = fuse_get_unique(fiq),  in fuse_read_single_forget()
1091 	spin_unlock(&fiq->lock);  in fuse_read_single_forget()
1107 static int fuse_read_batch_forget(struct fuse_iqueue *fiq,  in fuse_read_batch_forget()  argument
1109 __releases(fiq->lock)  in fuse_read_batch_forget()
1118 		.unique = fuse_get_unique(fiq),  in fuse_read_batch_forget()
1123 		spin_unlock(&fiq->lock);  in fuse_read_batch_forget()
1128 	head = fuse_dequeue_forget(fiq, max_forgets, &count);  in fuse_read_batch_forget()
1129 	spin_unlock(&fiq->lock);  in fuse_read_batch_forget()
1156 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1159 __releases(fiq->lock)  in fuse_read_forget()
1161 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1162 		return fuse_read_single_forget(fiq, cs, nbytes);  in fuse_read_forget()
1164 		return fuse_read_batch_forget(fiq, cs, nbytes);  in fuse_read_forget()
1181 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()  local
1208 		spin_lock(&fiq->lock);  in fuse_dev_do_read()
1209 		if (!fiq->connected || request_pending(fiq))  in fuse_dev_do_read()
1211 		spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1215 		err = wait_event_interruptible_exclusive(fiq->waitq,  in fuse_dev_do_read()
1216 				!fiq->connected || request_pending(fiq));  in fuse_dev_do_read()
1221 	if (!fiq->connected) {  in fuse_dev_do_read()
1226 	if (!list_empty(&fiq->interrupts)) {  in fuse_dev_do_read()
1227 		req = list_entry(fiq->interrupts.next, struct fuse_req,  in fuse_dev_do_read()
1229 		return fuse_read_interrupt(fiq, cs, nbytes, req);  in fuse_dev_do_read()
1232 	if (forget_pending(fiq)) {  in fuse_dev_do_read()
1233 		if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0)  in fuse_dev_do_read()
1234 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1236 		if (fiq->forget_batch <= -8)  in fuse_dev_do_read()
1237 			fiq->forget_batch = 16;  in fuse_dev_do_read()
1240 	req = list_entry(fiq->pending.next, struct fuse_req, list);  in fuse_dev_do_read()
1243 	spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1288 		queue_interrupt(fiq, req);  in fuse_dev_do_read()
1301 	spin_unlock(&fiq->lock);  in fuse_dev_do_read()
2023 	struct fuse_iqueue *fiq;  in fuse_dev_poll()  local
2029 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2030 	poll_wait(file, &fiq->waitq, wait);  in fuse_dev_poll()
2032 	spin_lock(&fiq->lock);  in fuse_dev_poll()
2033 	if (!fiq->connected)  in fuse_dev_poll()
2035 	else if (request_pending(fiq))  in fuse_dev_poll()
2037 	spin_unlock(&fiq->lock);  in fuse_dev_poll()
2090 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()  local
2132 		spin_lock(&fiq->lock);  in fuse_abort_conn()
2133 		fiq->connected = 0;  in fuse_abort_conn()
2134 		list_for_each_entry(req, &fiq->pending, list)  in fuse_abort_conn()
2136 		list_splice_tail_init(&fiq->pending, &to_end);  in fuse_abort_conn()
2137 		while (forget_pending(fiq))  in fuse_abort_conn()
2138 			kfree(fuse_dequeue_forget(fiq, 1, NULL));  in fuse_abort_conn()
2139 		wake_up_all(&fiq->waitq);  in fuse_abort_conn()
2140 		spin_unlock(&fiq->lock);  in fuse_abort_conn()
2141 		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_abort_conn()